fix: catch err when missing space

[CjiW]

将 token 分为 word 和 symbol
修复：

• 捕获错误
• 错误容忍

[codecov]

Codecov Report

Merging #155 (dc10277) into master (ac76010) will decrease coverage by 0.81%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #155      +/-   ##
==========================================
- Coverage   88.63%   87.82%   -0.82%     
==========================================
  Files          64       65       +1     
  Lines       10930    11035     +105     
==========================================
+ Hits         9688     9691       +3     
- Misses       1242     1344     +102     

Impacted Files	Coverage Δ
src/nomparser/array.rs	81.25% <100.00%> (+4.32%)	⬆️
src/nomparser/comment.rs	100.00% <100.00%> (ø)
src/nomparser/constval.rs	100.00% <100.00%> (ø)
src/nomparser/control.rs	97.84% <100.00%> (+0.18%)	⬆️
src/nomparser/expression.rs	99.51% <100.00%> (+<0.01%)	⬆️
src/nomparser/function.rs	98.96% <100.00%> (+0.01%)	⬆️
src/nomparser/helper.rs	85.89% <100.00%> (+2.82%)	⬆️
src/nomparser/identifier.rs	96.73% <100.00%> (+0.10%)	⬆️
src/nomparser/implement.rs	98.57% <100.00%> (+0.18%)	⬆️
src/nomparser/pkg.rs	100.00% <100.00%> (ø)
... and 13 more

[Chronostasys]

LGTM!