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ba8f00eef6
Previously, the internal name of a PL/Tcl function was just "__PLTcl_proc_NNNN", where NNNN is the function OID. That's pretty unhelpful when reading an error report. Plus it prevents us from testing the CONTEXT output for PL/Tcl errors, since the OIDs shown in the regression tests wouldn't be stable. Instead, base the internal name on the result of format_procedure(), which will be unique in most cases. For the edge cases where it's not, we can append the function OID to make it unique. Sadly, the pltcl_trigger.sql test script still has to suppress the context reports, because they'd include trigger arguments which contain relation OIDs per PL/Tcl's longstanding API for triggers. I had to modify one existing test case to throw a different error than before, because I found that Tcl 8.5 and Tcl 8.6 spell the context message for the original error slightly differently. We might have to make more adjustments in that vein once this gets wider testing. Patch by me; thanks to Pavel Stehule for the idea to use format_procedure() rather than just the proname. Discussion: https://postgr.es/m/890581.1717609350@sss.pgh.pa.us