Look ahead extra token to spot Token::Range(Incl)

[JSAbrahams]

Relevant issues

Closes #254

Summary

Added Tests

• Int and Real tokenized
• Real followed by Point tokenized
• RangeIncl with and without spaces, surrounded by integers, tokenized
• Range with and without spaces, surrounded by integers, tokenized

[codecov[bot]]

Codecov Report

Merging #257 (f746cfe) into develop (28917f3) will increase coverage by 0.11%. The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop     #257      +/-   ##
===========================================
+ Coverage    80.92%   81.04%   +0.11%     
===========================================
  Files           99       99              
  Lines         8940     9006      +66     
===========================================
+ Hits          7235     7299      +64     
- Misses        1705     1707       +2     

Impacted Files	Coverage Δ
src/parse/lex/tokenize.rs	97.56% <100.00%> (+0.72%)	:arrow_up:
src/check/constrain/generate/control_flow.rs	63.09% <0.00%> (-1.20%)	:arrow_down:
src/check/constrain/generate/call.rs	79.50% <0.00%> (-0.63%)	:arrow_down:

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