collapse consecutive ** segments in glob translation - #155
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Noticed each
**segment becomes.*under(?s:)intranslate_core, so a pattern with consecutive**segments (**/**/**/...) emits adjacent.*separated by a slash. Matching one of those against a namelist entry of slashes backtracks catastrophically (around 8s at 15 segments, exponential in the count). Since**/**matches exactly what**does, collapse runs of**segments before translating so matching stays linear.