use %% in wayOfBerserkExplanation

app/views/site/faq.scala

@@ -237,7 +237,6 @@ object faq {
           ),
           p(
             wayOfBerserkExplanation(
-              "%",
               a(href := "https://lichess.org/tournament/cDyjj1nL")(aHourlyBulletTournament())
             )
           ),

bin/trans-lint.py

@@ -132,8 +132,9 @@ def lint_string(ctx, dest, source, allow_missing=0):
         m_dest = dest if pattern.isupper() else dest.lower()
         if pattern in m_source and pattern not in m_dest:
             ctx.notice(f"missing {pattern}")
-        #elif pattern not in m_source and pattern in m_dest:
-        #    ctx.notice(f"unexpected {pattern}")
+
+    if "%%" in source and "%%" not in dest:
+        ctx.warning("missing %%")
 
     if "PGN" in source and "PNG" in dest:
         ctx.warning("PNG instead of PGN")

translation/source/faq.xml

@@ -95,7 +95,7 @@ Do not ask for the LM title.</string>
   <string name="guidelines">guidelines</string>
   <string name="uniqueTrophies">Unique trophies</string>
   <string name="ownerUniqueTrophies">That trophy is unique in the history of Lichess, nobody other than %1$s will ever have it.</string>
-  <string name="wayOfBerserkExplanation">To get it, hiimgosu challenged himself to berserk and win 100%1$s games of %2$s.</string>
+  <string name="wayOfBerserkExplanation">To get it, hiimgosu challenged himself to berserk and win 100%% games of %s.</string>
   <string name="aHourlyBulletTournament">a hourly Bullet tournament</string>
   <string name="goldenZeeExplanation">ZugAddict was streaming and for the last 2 hours he had been trying to defeat A.I. level 8 in a 1+0 game, without success. Thibault told him that if he successfully did it on stream, he'd get a unique trophy. One hour later, he smashed Stockfish, and the promise was honoured.</string>
   <string name="lichessRatings">Lichess ratings</string>