Support terminal colors for logger.

_clang-format

@@ -20,7 +20,7 @@ AlwaysBreakBeforeMultilineStrings: true
 AlwaysBreakTemplateDeclarations: Yes
 BinPackArguments: true
 BinPackParameters: true
-BraceWrapping:   
+BraceWrapping:
   AfterClass:      false
   AfterControlStatement: false
   AfterEnum:       false
@@ -56,12 +56,12 @@ DerivePointerAlignment: false
 DisableFormat:   false
 ExperimentalAutoDetectBinPacking: false
 FixNamespaceComments: true
-ForEachMacros:   
+ForEachMacros:
   - foreach
   - Q_FOREACH
   - BOOST_FOREACH
 IncludeBlocks:   Preserve
-IncludeCategories: 
+IncludeCategories:
   - Regex:           '^<ext/.*\.h>'
     Priority:        2
   - Regex:           '^<.*\.h>'
@@ -95,9 +95,9 @@ PenaltyBreakTemplateDeclaration: 10
 PenaltyExcessCharacter: 1000000
 PenaltyReturnTypeOnItsOwnLine: 200
 PointerAlignment: Left
-RawStringFormats: 
+RawStringFormats:
   - Language:        Cpp
-    Delimiters:      
+    Delimiters:
       - cc
       - CC
       - cpp
@@ -108,12 +108,12 @@ RawStringFormats:
     CanonicalDelimiter: ''
     BasedOnStyle:    google
   - Language:        TextProto
-    Delimiters:      
+    Delimiters:
       - pb
       - PB
       - proto
       - PROTO
-    EnclosingFunctions: 
+    EnclosingFunctions:
       - EqualsProto
       - EquivToProto
       - PARSE_PARTIAL_TEXT_PROTO