CPU: remove duplicate whitespaces in CPU name

Eg. `Intel(R) Xeon(R) CPU           E5620  @ 2.40GHz`

src/detection/cpu/cpu.c

@@ -16,6 +16,7 @@ const char* ffDetectCPU(const FFCPUOptions* options, FFCPUResult* cpu)
     ffStrbufRemoveStrings(&cpu->name, ARRAY_SIZE(removeStrings), removeStrings);
     ffStrbufSubstrBeforeFirstC(&cpu->name, '@'); //Cut the speed output in the name as we append our own
     ffStrbufTrimRight(&cpu->name, ' '); //If we removed the @ in previous step there was most likely a space before it
+    ffStrbufRemoveDupWhitespaces(&cpu->name);
     return NULL;
 }
 

src/util/FFstrbuf.c

@@ -575,3 +575,25 @@ bool ffStrbufGetline(char** lineptr, size_t* n, FFstrbuf* buffer)
         *n = remaining;
     return true;
 }
+
+bool ffStrbufRemoveDupWhitespaces(FFstrbuf* strbuf)
+{
+    if (strbuf->allocated == 0) return false; // Doesn't work with static strings
+
+    bool changed = false;
+    for (uint32_t i = 0; i < strbuf->length; i++)
+    {
+        if (strbuf->chars[i] != ' ') continue;
+
+        i++;
+        uint32_t j = i;
+        for (; j < strbuf->length && strbuf->chars[j] == ' '; j++);
+
+        if (j == i) continue;
+        memmove(&strbuf->chars[i], &strbuf->chars[j], strbuf->length - j + 1);
+        strbuf->length -= j - i;
+        changed = true;
+    }
+
+    return changed;
+}

src/util/FFstrbuf.h

@@ -91,6 +91,7 @@ void ffStrbufUpperCase(FFstrbuf* strbuf);
 void ffStrbufLowerCase(FFstrbuf* strbuf);
 
 bool ffStrbufGetline(char** lineptr, size_t* n, FFstrbuf* buffer);
+bool ffStrbufRemoveDupWhitespaces(FFstrbuf* strbuf);
 
 FF_C_NODISCARD static inline FFstrbuf ffStrbufCreateA(uint32_t allocate)
 {