Fixes a variable assignment that landed in the wrong branch during a conflict
merge (a4451fb). Commit a8575f4 fixed a spec failure but the original code
This restores the original functionality in #14136 where a non-specific
context (i.e. /files/etc) would be optimised (only load lenses for files under
/etc) but since it was vague, would only log load errors to debug. Instead,
load errors were reported as warnings for non-specific contexts.
Load errors will continue to be reported as warnings for supplied contexts if