Fix comment length computation

Resolved an issue where "end of line" comments matching the
configured line length were incorrectly flagged as exceeding it.

Author: rauhul

Sources/SwiftFormat/PrettyPrint/Comment.swift

@@ -67,9 +67,9 @@ struct Comment {
 
     switch kind {
     case .line, .docLine:
+      self.length = text.count
       self.text = [text]
       self.text[0].removeFirst(kind.prefixLength)
-      self.length = self.text.reduce(0, { $0 + $1.count + kind.prefixLength + 1 })
 
     case .block, .docBlock:
       var fulltext: String = text

Sources/SwiftFormat/PrettyPrint/PrettyPrint.swift

@@ -558,7 +558,9 @@ public class PrettyPrinter {
   /// Indicates whether the current line can fit a string of the given length. If no length
   /// is given, it indicates whether the current line can accomodate *any* text.
   private func canFit(_ length: Int = 1) -> Bool {
+//    print("\(length)")
     let spaceRemaining = configuration.lineLength - outputBuffer.column
+//    print("let \(spaceRemaining) = \(configuration.lineLength) - \(outputBuffer.column)")
     return outputBuffer.isAtStartOfLine || length <= spaceRemaining
   }
 

Tests/SwiftFormatTests/PrettyPrint/CommentTests.swift

@@ -985,7 +985,8 @@ final class CommentTests: PrettyPrintTestCase {
     assertPrettyPrintEqual(
       input: """
         import veryveryverylongmodulenameherebecauseitistypical  // special sentinel comment
-
+        
+        let x  // this comment should line up with 45
         func fooBarBazRunningOutOfIdeas() {  1️⃣// comment that needs to move
           if foo {  // comment is fine
           }
@@ -995,6 +996,7 @@ final class CommentTests: PrettyPrintTestCase {
       expected: """
         import veryveryverylongmodulenameherebecauseitistypical  // special sentinel comment
 
+        let x  // this comment should line up with 45
         func fooBarBazRunningOutOfIdeas() {  // comment that needs to move
           if foo {  // comment is fine
           }