st: I'll never understand quotes

["FEIVESON, ALAN H. (AL) (JSC-SK) (NASA)" <alan.h.feiveson@nasa.gov>]

Hello - could someone please explain why statement #3 below fails if I put
double quotes around `sdir', but statement #2 needs to have double quotes?

1.	args gog sdir
2.	gen str5 sdir = "`sdir'" 
3.	save gait_`gog'_`sdir', replace   (works)
3.	save gait_`gog'_"`sdir'", replace   (fails)

Thanks

Al Feiveson







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