Improved strictness and speed of regexp matching #312

[yulvil]

For #312

The regexps are now stricter, i.e. need to match the whole line.

There is a minimal speed improvement by skipping the NodeName.

$ go test -run=NONE -bench=. -benchtime=10s > old
[change code]
$ go test -run=NONE -bench=. -benchtime=10s > new

$ go install golang.org/x/tools/cmd/benchcmp
$ benchcmp old new
benchmark          old ns/op     new ns/op     delta
BenchmarkParse     27993406      25026323      -10.60%

@elliotchance Is it possible to leave the issue open after this merge? I would like to make more changes.

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This change is 

[codecov]

Codecov Report

Merging #339 into master will increase coverage by 0.02%.
The diff coverage is 93.33%.

@@            Coverage Diff             @@
##           master     #339      +/-   ##
==========================================
+ Coverage    81.6%   81.62%   +0.02%     
==========================================
  Files         142      142              
  Lines        6011     6013       +2     
==========================================
+ Hits         4905     4908       +3     
+ Misses        886      885       -1     
  Partials      220      220

Impacted Files	Coverage Δ
ast/function_decl.go	93.93% <100%> (-0.51%)	⬇️
ast/record_decl.go	94.28% <100%> (+0.16%)	⬆️
ast/var_decl.go	94.44% <100%> (+0.15%)	⬆️
ast/typedef_decl.go	93.93% <100%> (+0.18%)	⬆️
ast/ast.go	98% <83.33%> (+0.52%)	⬆️

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[elliotchance]

Reviewed 9 of 9 files at r1.
Review status: all files reviewed at latest revision, all discussions resolved.

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