minor - improve error message for uncompiled backends

Author: jeremylt

backends/ceed-backend-weak.c

@@ -6,7 +6,9 @@
 // This function provides improved error messages for uncompiled backends
 static int CeedInit_Weak(const char *resource, Ceed ceed) {
   return CeedError(ceed, CEED_ERROR_UNSUPPORTED,
-                   "Backend not currently compiled: %s", resource);
+                   "Backend not currently compiled: %s\n"
+                   "Consult the installation instructions to compile this backend",
+                   resource);
 }
 
 // This function provides a debug target for weak symbols

interface/ceed.c

@@ -709,7 +709,7 @@ int CeedInit(const char *resource, Ceed *ceed) {
     // LCOV_EXCL_STOP
   } else if (match_len != stem_length) {
     // LCOV_EXCL_START
-    return CeedError(NULL, CEED_ERROR_MAJOR, "No suitable backend: %s "
+    return CeedError(NULL, CEED_ERROR_MAJOR, "No suitable backend: %s\n"
                      "Closest match: %s", resource, backends[match_idx].prefix);
     // LCOV_EXCL_STOP
   }