[Bug target/79871] New: i18n: document placeholders for translators

[roland.illig at gmx dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79871

            Bug ID: 79871
           Summary: i18n: document placeholders for translators
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: roland.illig at gmx dot de
  Target Milestone: ---

from config/arm/arm.c:

error ("%K%s %wd out of range %wd - %wd",

As a translator I have no idea what the first two placeholders are and why they
are written without a space between them. This should be documented like this:

/* TRANSLATORS: %K can be "...", %s can be "..." */
error ("%K%s %wd out of range %wd - %wd",