How to Identify Invisible Characters in Strings?

[Kailin Gao]

Dear Statalists,
I collected data from the internet. One variable looks identical to my eyes but appears differently in Stata 16 SE. As shown in the picture below, both strings are "waterproofing_materials", but one has 23 in length, the other has 26. I guess some invisible characters exist there, but I could not figure out what they are yet.
I tried replacing char(1) to char(40), but it does not make a difference. I uploaded the dta and excel file as attachments. Any suggestions would be appreciated.
Best,
Kailin

[Kailin Gao]

Sorry, I just found out the solution! It seems that I could not delete the post myself.
Happy to share the solution in case anyone is interested:

charlist
return lsit
disp r(ascii)
*95 97 101 102 103 105 108 109 110 111 112 114 115 116 119 187 191 239 
replace ind3=subinstr(ind3,char(187),"",.)
replace ind3=subinstr(ind3,char(191),"",.)
replace ind3=subinstr(ind3,char(239),"",.)