assembler: Error if extra args are present in pragmas

[jasonpaulos]

Summary

One might think these programs are equivalent:

#pragma version 5; int 1

#pragma version 5
int 1

However, they are not. Pragma lines are "greedy" in that they consume all tokens in a line, but only look at the first 3.

I've ran into this a few times, so I thought it would be a good idea to at least error if you try to assemble with extra stuff after a pragma.

A better solution would be to treat semicolons as newlines and make those example programs actually equal, but I've not gone that far in this PR. (And it deserves some extra thought, since it's currently illegal to start a directive unless it's the first thing in a line. Plus #define is greedy because it actually consumes the whole line.)

Test Plan

Unit test added, existing tests fixed.

[codecov]

Codecov Report

Merging #5400 (6bd9c70) into master (b376efd) will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #5400      +/-   ##
==========================================
+ Coverage   55.38%   55.43%   +0.05%     
==========================================
  Files         452      452              
  Lines       63685    63689       +4     
==========================================
+ Hits        35269    35308      +39     
+ Misses      25990    25967      -23     
+ Partials     2426     2414      -12     

Impacted Files	Coverage Δ
data/transactions/logic/assembler.go	90.59% <100.00%> (+0.24%)	⬆️
netdeploy/remote/deployedNetwork.go	18.88% <100.00%> (ø)

... and 15 files with indirect coverage changes

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[jannotti]

This looks good. You've just invited yourself to be a reviewer on my big PR that changes a lot of error handling though... I'll have it up in an hour or so.

[jannotti]

This looks good. You've just invited yourself to be a reviewer on my big PR that changes a lot of error handling though... I'll have it up in an hour or so.