Fix various typos and missing whitespace.

Author: rjmansfield

include/swift/Option/FrontendOptions.td

@@ -181,9 +181,9 @@ def disable_typo_correction : Flag<["-"], "disable-typo-correction">,
 def disable_implicit_swift_modules: Flag<["-"], "disable-implicit-swift-modules">,
   HelpText<"Disable building Swift modules implicitly by the compiler">;
 
-def explict_swift_module_map
+def explicit_swift_module_map
   : Separate<["-"], "explicit-swift-module-map-file">, MetaVarName<"<path>">,
-    HelpText<"Specify a JSON file containing information of explict Swift modules">;
+    HelpText<"Specify a JSON file containing information of explicit Swift modules">;
 
 def placeholder_dependency_module_map
   : Separate<["-"], "placeholder-dependency-module-map-file">, MetaVarName<"<path>">,
@@ -194,7 +194,7 @@ def batch_scan_input_file
     HelpText<"Specify a JSON file containing modules to perform batch dependencies scanning">;
 
 def import_prescan : Flag<["-"], "import-prescan">,
-   HelpText<"When performing a dependency scan, only dentify all imports of the main Swift module sources">;
+   HelpText<"When performing a dependency scan, only identify all imports of the main Swift module sources">;
 
 def serialize_dependency_scan_cache : Flag<["-"], "serialize-dependency-scan-cache">,
    HelpText<"After performing a dependency scan, serialize the scanner's internal state.">;
@@ -816,7 +816,7 @@ def enable_verify_exclusivity : Flag<["-"], "enable-verify-exclusivity">,
   HelpText<"Enable verification of access markers used to enforce exclusivity.">;
 
 def disable_verify_exclusivity : Flag<["-"], "disable-verify-exclusivity">,
-  HelpText<"Diable verification of access markers used to enforce exclusivity.">;
+  HelpText<"Disable verification of access markers used to enforce exclusivity.">;
 
 def disable_legacy_type_info : Flag<["-"], "disable-legacy-type-info">,
   HelpText<"Completely disable legacy type layout">;

include/swift/Option/Options.td

@@ -704,7 +704,7 @@ def save_optimization_record_path :
 def save_optimization_record_passes :
   Separate<["-"], "save-optimization-record-passes">,
   Flags<[FrontendOption]>,
-  HelpText<"Only include passes which match a specified regular expression in"
+  HelpText<"Only include passes which match a specified regular expression in "
            "the generated optimization record "
            "(by default, include all passes)">, MetaVarName<"<regex>">;
 

lib/Frontend/CompilerInvocation.cpp

@@ -1155,7 +1155,7 @@ static bool ParseSearchPathArgs(SearchPathOptions &Opts,
   Opts.DisableModulesValidateSystemDependencies |=
       Args.hasArg(OPT_disable_modules_validate_system_headers);
 
-  if (const Arg *A = Args.getLastArg(OPT_explict_swift_module_map))
+  if (const Arg *A = Args.getLastArg(OPT_explicit_swift_module_map))
     Opts.ExplicitSwiftModuleMap = A->getValue();
   for (auto A: Args.filtered(OPT_candidate_module_file)) {
     Opts.CandidateCompiledModules.push_back(resolveSearchPath(A->getValue()));

utils/build_swift/build_swift/driver_arguments.py

@@ -518,7 +518,7 @@ def create_argument_parser():
            default=defaults.DSYMUTIL_JOBS,
            metavar='COUNT',
            help='the maximum number of parallel dsymutil jobs to use when '
-                'extracting symbols. Tweak with caution, since dsymutil'
+                'extracting symbols. Tweak with caution, since dsymutil '
                 'is memory intensive.')
 
     option('--disable-guaranteed-normal-arguments', store_true,