STYLE: make column limit more stringent in the examples

InsightSoftwareConsortium/ITKSoftwareGuide#131

Author: dzenanz

Examples/.clang-format

@@ -72,7 +72,7 @@ BreakConstructorInitializers: BeforeComma
 BreakAfterJavaFieldAnnotations: false
 BreakStringLiterals: true
 ## The following line uses shorter lines in documentation code
-ColumnLimit:     88
+ColumnLimit:     78
 CommentPragmas:  '^ IWYU pragma:'
 CompactNamespaces: false
 ConstructorInitializerAllOnOneLineOrOnePerLine: false