Extract trimTrailingComments()

Author: nene

src/formatter/formatCommaPositions.ts

@@ -63,8 +63,7 @@ function groupCommaDelimitedLines(lines: string[]): string[][] {
 
 // makes all lines the same length by appending spaces before comma
 function formatTabular(commaLines: string[]): string[] {
-  const commaLinesWithoutComments = commaLines.map(line => line.replace(/--.*/, ''));
-  const commaPosition = maxLength(commaLinesWithoutComments) - 1;
+  const commaPosition = maxLength(trimTrailingComments(commaLines)) - 1;
   return commaLines.map((line, i) => {
     if (i === commaLines.length - 1) {
       return line; // do not add comma for last item
@@ -101,3 +100,7 @@ function removeLastIndent(whitespace: string, indent: string): string {
 function trimTrailingCommas(lines: string[]): string[] {
   return lines.map(line => line.replace(/,(\s*(--.*)?$)/, '$1'));
 }
+
+function trimTrailingComments(lines: string[]): string[] {
+  return lines.map(line => line.replace(/--.*/, ''));
+}