Delete trailing whitespaces

NFC

Author: dduan

Sources/FileCheck/CheckString.swift

@@ -285,7 +285,7 @@ struct CheckString {
       // Update the last position with CHECK-DAG matches.
       lastPos = max(matchPos + range.length, lastPos)
     }
-    
+
     return (lastPos, notStrings, finalTable)
   }
 }

Sources/FileCheck/FileCheck.swift

@@ -145,7 +145,7 @@ public func fileCheckOutput(
       print("FileCheck error: input from file descriptor \(FD) is empty.")
       return false
     }
-    
+
     return true
   }
 
@@ -589,12 +589,12 @@ private func check(
       variableTable = mutVarTable
       checkRegion = checkRegion[checkRegion.index(checkRegion.startIndex, offsetBy: NSMaxRange(range))...]
     }
-    
+
     if j == checkStrings.count {
       break
     }
   }
-  
+
   // Success if no checks failed.
   return !failedChecks
 }

Sources/FileCheck/Pattern.swift

@@ -464,7 +464,7 @@ func countNewlines(in str : String) -> (count: Int, firstIndex: String.Index?) {
     //			Range = Range.substr(1)
     //		}
     range = range[range.index(after: range.startIndex)...]
-    
+
     if newlineCount == 1 {
       firstNewLine = range.startIndex
     }

Tests/FileCheckTests/DAGSpec.swift

@@ -14,7 +14,7 @@ class DAGSpec : XCTestCase {
       print("this is the string to be matched")
     })
   }
-  
+
   func testDAGWithInst() {
     XCTAssert(fileCheckOutput(of: .stdout, withPrefixes: ["CHECK-INSTDAG"]) {
       // CHECK-INSTDAG-DAG: add [[REG1:r[0-9]+]], r1, r2

Tests/FileCheckTests/LabelSpec.swift

@@ -18,7 +18,7 @@ class LabelSpec : XCTestCase {
       "c",
     ].joined(separator: "\n"))
   }
-  
+
   func testLabels() {
     XCTAssert(fileCheckOutput(of: .stdout, withPrefixes: ["CHECKOK"]) {
       // CHECKOK-LABEL: {{^}}label0:

Tests/FileCheckTests/VariableRefSpec.swift

@@ -14,7 +14,7 @@ class VariableRefSpec : XCTestCase {
       print("op4 g1, g2, g1")
     })
   }
-  
+
   #if !os(macOS)
   static var allTests = testCase([
     ("testSameLineVarRef", testSameLineVarRef),