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Minor changes to tiny_run.py, make the error source snippet more useful by adding line numbering and a ">" pointer to the erroneous line, and skip a line before the exception explanation

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examples/tiny
- tiny_run.py

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`‎examples/tiny/tiny_run.py‎`

Lines changed: 11 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -40,9 +40,18 @@ def main(argv: list[str] \| None = None) -> int:`
`40`	`40`	`parsed=parse_tiny(source_text)`
`41`	`41`	`exceptpp.ParseBaseExceptionasexc:`
`42`	`42`	`# Print helpful location info`
`43`		`-error_line=exc.lineno`
`44`		`-fragment="\n".join(source_text.splitlines()[error_line-3 :error_line+1])`
	`43`	`+error_lineno=exc.lineno`
	`44`	`+lineno_len=len(str(error_lineno+1))`
	`45`	`+*prelude,error_line,postlude=source_text.splitlines()[max(error_lineno-3,0) :error_lineno+1]`
	`46`	`+fragment="\n".join(`
	`47`	`+ [`
	`48`	`+*(f"{prelineno:>{lineno_len}}:{line}"forprelineno,lineinenumerate(prelude,start=error_lineno-len(prelude))),`
	`49`	`+f"{error_lineno:>{lineno_len}}: >{error_line}",`
	`50`	`+f"{error_lineno+1:>{lineno_len}}:{postlude}",`
	`51`	`+ ]`
	`52`	`+ )`
`45`	`53`	`print(fragment)`
	`54`	`+print()`
`46`	`55`	`print(exc.explain(depth=0))`
`47`	`56`	`return3`
`48`	`57`

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Commit083bf47

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`‎examples/tiny/tiny_run.py‎`

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