Remove trailing whitespace from tsconfig.json (#16197)

* Remove trailing whitespace from tsconfig.json

* Simplify

Author: t-mrt

src/compiler/commandLineParser.ts

@@ -1042,7 +1042,7 @@ namespace ts {
             for (let i = 0; i < nameColumn.length; i++) {
                 const optionName = nameColumn[i];
                 const description = descriptionColumn[i];
-                result.push(tab + tab + optionName + makePadding(marginLength - optionName.length + 2) + description);
+                result.push(optionName && `${tab}${tab}${optionName}${ description && (makePadding(marginLength - optionName.length + 2) + description)}`);
             }
             if (configurations.files && configurations.files.length) {
                 result.push(`${tab}},`);

tests/baselines/reference/tsConfig/Default initialized TSConfig/tsconfig.json

@@ -1,6 +1,6 @@
 {
   "compilerOptions": {
-    /* Basic Options */                       
+    /* Basic Options */
     "target": "es5",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', or 'ESNEXT'. */
     "module": "commonjs",                     /* Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'. */
     // "lib": [],                             /* Specify library files to be included in the compilation:  */
@@ -17,36 +17,36 @@
     // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
     // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
     // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
-                                              
-    /* Strict Type-Checking Options */        
+
+    /* Strict Type-Checking Options */
     "strict": true                            /* Enable all strict type-checking options. */
     // "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
     // "strictNullChecks": true,              /* Enable strict null checks. */
     // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
     // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */
-                                              
-    /* Additional Checks */                   
+
+    /* Additional Checks */
     // "noUnusedLocals": true,                /* Report errors on unused locals. */
     // "noUnusedParameters": true,            /* Report errors on unused parameters. */
     // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
     // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
-                                              
-    /* Module Resolution Options */           
+
+    /* Module Resolution Options */
     // "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
     // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
     // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
     // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
     // "typeRoots": [],                       /* List of folders to include type definitions from. */
     // "types": [],                           /* Type declaration files to be included in compilation. */
     // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
-                                              
-    /* Source Map Options */                  
+
+    /* Source Map Options */
     // "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */
     // "mapRoot": "./",                       /* Specify the location where debugger should locate map files instead of generated locations. */
     // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
     // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
-                                              
-    /* Experimental Options */                
+
+    /* Experimental Options */
     // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
     // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
   }

tests/baselines/reference/tsConfig/Initialized TSConfig with boolean value compiler options/tsconfig.json

@@ -1,6 +1,6 @@
 {
   "compilerOptions": {
-    /* Basic Options */                       
+    /* Basic Options */
     "target": "es5",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', or 'ESNEXT'. */
     "module": "commonjs",                     /* Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'. */
     // "lib": [],                             /* Specify library files to be included in the compilation:  */
@@ -17,36 +17,36 @@
     // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
     // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
     // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
-                                              
-    /* Strict Type-Checking Options */        
+
+    /* Strict Type-Checking Options */
     "strict": true,                           /* Enable all strict type-checking options. */
     // "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
     // "strictNullChecks": true,              /* Enable strict null checks. */
     // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
     // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */
-                                              
-    /* Additional Checks */                   
+
+    /* Additional Checks */
     "noUnusedLocals": true                    /* Report errors on unused locals. */
     // "noUnusedParameters": true,            /* Report errors on unused parameters. */
     // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
     // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
-                                              
-    /* Module Resolution Options */           
+
+    /* Module Resolution Options */
     // "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
     // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
     // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
     // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
     // "typeRoots": [],                       /* List of folders to include type definitions from. */
     // "types": [],                           /* Type declaration files to be included in compilation. */
     // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
-                                              
-    /* Source Map Options */                  
+
+    /* Source Map Options */
     // "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */
     // "mapRoot": "./",                       /* Specify the location where debugger should locate map files instead of generated locations. */
     // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
     // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
-                                              
-    /* Experimental Options */                
+
+    /* Experimental Options */
     // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
     // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
   }

tests/baselines/reference/tsConfig/Initialized TSConfig with enum value compiler options/tsconfig.json

@@ -1,6 +1,6 @@
 {
   "compilerOptions": {
-    /* Basic Options */                       
+    /* Basic Options */
     "target": "es5",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', or 'ESNEXT'. */
     "module": "commonjs",                     /* Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'. */
     // "lib": [],                             /* Specify library files to be included in the compilation:  */
@@ -17,36 +17,36 @@
     // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
     // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
     // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
-                                              
-    /* Strict Type-Checking Options */        
+
+    /* Strict Type-Checking Options */
     "strict": true                            /* Enable all strict type-checking options. */
     // "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
     // "strictNullChecks": true,              /* Enable strict null checks. */
     // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
     // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */
-                                              
-    /* Additional Checks */                   
+
+    /* Additional Checks */
     // "noUnusedLocals": true,                /* Report errors on unused locals. */
     // "noUnusedParameters": true,            /* Report errors on unused parameters. */
     // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
     // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
-                                              
-    /* Module Resolution Options */           
+
+    /* Module Resolution Options */
     // "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
     // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
     // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
     // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
     // "typeRoots": [],                       /* List of folders to include type definitions from. */
     // "types": [],                           /* Type declaration files to be included in compilation. */
     // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
-                                              
-    /* Source Map Options */                  
+
+    /* Source Map Options */
     // "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */
     // "mapRoot": "./",                       /* Specify the location where debugger should locate map files instead of generated locations. */
     // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
     // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
-                                              
-    /* Experimental Options */                
+
+    /* Experimental Options */
     // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
     // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
   }

tests/baselines/reference/tsConfig/Initialized TSConfig with files options/tsconfig.json

@@ -1,6 +1,6 @@
 {
   "compilerOptions": {
-    /* Basic Options */                       
+    /* Basic Options */
     "target": "es5",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', or 'ESNEXT'. */
     "module": "commonjs",                     /* Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'. */
     // "lib": [],                             /* Specify library files to be included in the compilation:  */
@@ -17,36 +17,36 @@
     // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
     // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
     // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
-                                              
-    /* Strict Type-Checking Options */        
+
+    /* Strict Type-Checking Options */
     "strict": true                            /* Enable all strict type-checking options. */
     // "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
     // "strictNullChecks": true,              /* Enable strict null checks. */
     // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
     // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */
-                                              
-    /* Additional Checks */                   
+
+    /* Additional Checks */
     // "noUnusedLocals": true,                /* Report errors on unused locals. */
     // "noUnusedParameters": true,            /* Report errors on unused parameters. */
     // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
     // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
-                                              
-    /* Module Resolution Options */           
+
+    /* Module Resolution Options */
     // "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
     // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
     // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
     // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
     // "typeRoots": [],                       /* List of folders to include type definitions from. */
     // "types": [],                           /* Type declaration files to be included in compilation. */
     // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
-                                              
-    /* Source Map Options */                  
+
+    /* Source Map Options */
     // "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */
     // "mapRoot": "./",                       /* Specify the location where debugger should locate map files instead of generated locations. */
     // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
     // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
-                                              
-    /* Experimental Options */                
+
+    /* Experimental Options */
     // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
     // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
   },