Changed most "backticks" (grave accents) into apostrophes.

Quotations that are embraced by tick marks now look better, in most fonts.

src/co65/convert.c

@@ -394,7 +394,7 @@ void Convert (const O65Data* D)
         switch (O->Type) {
 
             case O65_OPT_FILENAME:
-                Print (stdout, 1, "O65 filename option:         `%s'\n",
+                Print (stdout, 1, "O65 filename option:         '%s'\n",
                        GetO65OptionText (O));
                 break;
 
@@ -402,7 +402,7 @@ void Convert (const O65Data* D)
                 if (O->Len == 2) {
                     Warning ("Operating system option without data found");
                 } else {
-                    Print (stdout, 1, "O65 operating system option: `%s'\n",
+                    Print (stdout, 1, "O65 operating system option: '%s'\n",
                            GetO65OSName (O->Data[0]));
                     switch (O->Data[0]) {
                         case O65_OS_CC65_MODULE:
@@ -418,7 +418,7 @@ void Convert (const O65Data* D)
                 break;
 
             case O65_OPT_ASM:
-                Print (stdout, 1, "O65 assembler option:        `%s'\n",
+                Print (stdout, 1, "O65 assembler option:        '%s'\n",
                        GetO65OptionText (O));
                 break;
 
@@ -427,11 +427,11 @@ void Convert (const O65Data* D)
                     xfree (Author);
                 }
                 Author = xstrdup (GetO65OptionText (O));
-                Print (stdout, 1, "O65 author option:           `%s'\n", Author);
+                Print (stdout, 1, "O65 author option:           '%s'\n", Author);
                 break;
 
             case O65_OPT_TIMESTAMP:
-                Print (stdout, 1, "O65 timestamp option:        `%s'\n",
+                Print (stdout, 1, "O65 timestamp option:        '%s'\n",
                        GetO65OptionText (O));
                 break;
 
@@ -450,11 +450,11 @@ void Convert (const O65Data* D)
     /* Open the output file */
     F = fopen (OutputName, "w");
     if (F == 0) {
-        Error ("Cannot open `%s': %s", OutputName, strerror (errno));
+        Error ("Cannot open '%s': %s", OutputName, strerror (errno));
     }
 
     /* Create a header */
-    fprintf (F, ";\n; File generated by co65 v %s using model `%s'\n;\n",
+    fprintf (F, ";\n; File generated by co65 v %s using model '%s'\n;\n",
              GetVersionAsString (), GetModelName (Model));
 
     /* Select the CPU */

src/co65/main.c

@@ -112,7 +112,7 @@ static void CheckLabelName (const char* Label)
     }
 
     if (*L) {
-        Error ("Label name `%s' is invalid", Label);
+        Error ("Label name '%s' is invalid", Label);
     }
 }
 
@@ -123,7 +123,7 @@ static void CheckSegName (const char* Seg)
 {
     /* Print an error and abort if the name is not ok */
     if (!ValidSegName (Seg)) {
-        Error ("Segment name `%s' is invalid", Seg);
+        Error ("Segment name '%s' is invalid", Seg);
     }
 }
 
@@ -244,7 +244,7 @@ static void OptO65Model (const char* Opt attribute ((unused)), const char* Arg)
     /* Search for the model name */
     Model = FindModel (Arg);
     if (Model == O65_MODEL_INVALID) {
-        Error ("Unknown o65 model `%s'", Arg);
+        Error ("Unknown o65 model '%s'", Arg);
     }
 }
 
@@ -387,7 +387,7 @@ int main (int argc, char* argv [])
         } else {
             /* Filename. Check if we already had one */
             if (InputName) {
-                Error ("Don't know what to do with `%s'", Arg);
+                Error ("Don't know what to do with '%s'", Arg);
             } else {
                 InputName = Arg;
             }

src/co65/o65.c

@@ -361,7 +361,7 @@ O65Data* ReadO65File (const char* Name)
     /* Open the o65 input file */
     FILE* F = fopen (Name, "rb");
     if (F == 0) {
-        Error ("Cannot open `%s': %s", Name, strerror (errno));
+        Error ("Cannot open '%s': %s", Name, strerror (errno));
     }
 
     /* Read the file data */