Linebreak should not apply for leading whitespace #400

Job	Run time
macos (tiny)	1m 38s
windows (HUGE, msvc, no, no, x64, stable)	7m 32s
macos (normal)	1m 42s
linux (tiny, clang, native)	2m 19s
windows (HUGE, mingw, yes, yes, x86, stable, yes)	15m 52s
macos (huge)	2m 45s
linux (tiny, gcc, native)	1m 56s
windows (HUGE, msvc, no, yes, x86)	11m 34s
linux (normal, clang, native)	1m 58s
windows (HUGE, mingw, yes, no, x64, yes)	11m 50s
windows (NORMAL, msvc, yes, no, x86)	9m 13s
linux (normal, gcc, native)	2m 35s
windows (NORMAL, mingw, no, yes, x64)	12m 24s
linux (huge, clang, native)	1m 34s
windows (TINY, msvc, yes, yes, x64)	2m 34s
linux (huge, gcc, native)	1m 42s
windows (TINY, mingw, no, no, x86)	4m 45s
linux (tiny, clang, nogui)	1m 30s
linux (tiny, gcc, nogui)	1m 37s
linux (normal, gcc, i386, ./src/shadow)	2m 53s
linux (huge, gcc, uchar, testgui, true, dynamic)	1m 21s
linux (huge, clang, asan, 5.1)	2m 4s
linux (huge, gcc, unittests, true)	2m 8s
linux (normal, gcc, vimtags)	2m 0s
	1h 47m 26s

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