[gardening] Fix "a" vs. "an" issues.

Author: practicalswift

include/swift/AST/DiagnosticsSema.def

@@ -2143,7 +2143,7 @@ ERROR(closure_implicit_capture_mutating_self,none,
       "closure cannot implicitly capture a mutating self parameter",
       ())
 ERROR(nested_function_with_implicit_capture_argument,none,
-      "nested function with %select{a |}0implicitly captured inout "
+      "nested function with %select{an |}0implicitly captured inout "
       "parameter%select{|s}0 can only be used as a @noescape argument", (bool))
 ERROR(nested_function_escaping_inout_capture,none,
       "nested function cannot capture inout parameter and escape", ())

test/Sema/diag_invalid_inout_captures.swift

@@ -20,7 +20,7 @@ func remember(line: inout String) -> () -> Void {
         line = "I'm your man"
     }
     no_escape(despite_our_estrangement)
-    do_escape(despite_our_estrangement) // expected-error {{nested function with a implicitly captured inout parameter can only be used as a @noescape argument}}
+    do_escape(despite_our_estrangement) // expected-error {{nested function with an implicitly captured inout parameter can only be used as a @noescape argument}}
 
     return despite_our_estrangement // expected-error {{nested function cannot capture inout parameter and escape}}
 }

utils/swift_build_support/swift_build_support/debug.py

@@ -30,7 +30,7 @@ def print_xcodebuild_versions(file=sys.stdout):
     version = shell.capture(
         ['xcodebuild', '-version'], dry_run=False, echo=False).rstrip()
     # Allow non-zero exit codes.  Under certain obscure circumstances
-    # xcodebuild can exit with an non-zero exit code even when the SDK is
+    # xcodebuild can exit with a non-zero exit code even when the SDK is
     # usable.
     sdks = shell.capture(
         ['xcodebuild', '-version', '-sdk'], dry_run=False, echo=False,