common: adjust formatting of usage line

-remove version hash as it's printed above
-rename `usage` variable to `programDescription`

common/settings.cc

@@ -67,7 +67,7 @@ void setting_container::copyFrom(const setting_container& other)
 
 void setting_container::printHelp()
 {
-    fmt::print("{} ({})usage: {} [-help/-h/-?] [-options] {}\n\n", usage, stringify(ERICWTOOLS_VERSION), programName, remainderName);
+    fmt::print("{}usage: {} [-help/-h/-?] [-options] {}\n\n", programDescription, programName, remainderName);
 
     for (auto grouped : grouped()) {
         if (grouped.first) {

include/common/settings.hh

@@ -723,7 +723,9 @@ class setting_container
     std::map<const setting_group *, std::set<setting_base *>, less> _groupedSettings;
 
 public:
-    std::string programName, remainderName = "filename", usage;
+    std::string programName;
+    std::string remainderName = "filename";
+    std::string programDescription;
 
     inline setting_container() {}
 

include/light/light.hh

@@ -500,7 +500,7 @@ public:
     void setParameters(int argc, const char **argv) override
     {
         common_settings::setParameters(argc, argv);
-        usage = "light compiles lightmap data for BSPs\n\n";
+        programDescription = "light compiles lightmap data for BSPs\n\n";
         remainderName = "mapname.bsp";
     }
 

include/qbsp/qbsp.hh

@@ -228,7 +228,7 @@ public:
     void setParameters(int argc, const char **argv) override
     {
         common_settings::setParameters(argc, argv);
-        usage = "qbsp performs geometric level processing of Quake .MAP files to create\nQuake .BSP files.\n\n";
+        programDescription = "qbsp performs geometric level processing of Quake .MAP files to create\nQuake .BSP files.\n\n";
         remainderName = "sourcefile.map [destfile.bsp]";
     }
     void initialize(int argc, const char **argv) override;

include/vis/vis.hh

@@ -235,7 +235,7 @@ public:
     void setParameters(int argc, const char **argv) override
     {
         common_settings::setParameters(argc, argv);
-        usage = "vis calculates the visibility (and hearability) sets for \n.BSP files.\n\n";
+        programDescription = "vis calculates the visibility (and hearability) sets for \n.BSP files.\n\n";
         remainderName = "mapname.bsp";
     }
     void initialize(int argc, const char **argv) override;