reintroduce some of the assertions

This time after verifying they are all safe and avoiding to
add indentation issues that might obscure their scope.

src/pcre2_auto_possess.c

@@ -1121,7 +1121,7 @@ for(;;)
   if (list[1] == 0) return TRUE;
   }
 
-  PCRE2_UNREACHABLE(); /* Control never reaches here */
+PCRE2_UNREACHABLE(); /* Control never reaches here */
 }
 
 

src/pcre2_compile.c

@@ -5245,7 +5245,7 @@ for (;;)
     }
   }
 
-  PCRE2_UNREACHABLE(); /* Control never reaches here */
+PCRE2_UNREACHABLE(); /* Control never reaches here */
 }
 
 
@@ -9400,7 +9400,7 @@ for (;; pptr++)
   pptr += meta_extra_lengths[meta];
   }
 
-  PCRE2_UNREACHABLE(); /* Control never reaches here */
+PCRE2_UNREACHABLE(); /* Control never reaches here */
 }
 
 

src/pcre2_study.c

@@ -759,7 +759,7 @@ for (;;)
     }
   }
 
-  PCRE2_UNREACHABLE(); /* Control never reaches here */
+PCRE2_UNREACHABLE(); /* Control never reaches here */
 }
 
 

src/pcre2grep.c

@@ -903,7 +903,7 @@ for (;;)
     return dent->d_name;
   }
 
-  PCRE2_UNREACHABLE(); /* Control never reaches here */
+PCRE2_UNREACHABLE(); /* Control never reaches here */
 }
 
 static void

src/pcre2test.c

@@ -3600,7 +3600,7 @@ for (;;)
     }
   }
 
-  PCRE2_UNREACHABLE(); /* Control never reaches here */
+PCRE2_UNREACHABLE(); /* Control never reaches here */
 }