[nfc] docu typos

Author: ferdymercury

gui/gui/src/TRootDialog.cxx

@@ -133,7 +133,7 @@ const char *TRootDialog::GetParameters()
 
       // TODO: Combobox...
 
-      // if necessary, replace the selected object by it's address
+      // if necessary, replace the selected object by its address
       if (selfobjpos == nparam-1) {
          if (params.Length()) params += ",";
          param = TString::Format("(TObject*)0x%zx",

gui/guibuilder/src/TGuiBldDragManager.cxx

@@ -230,7 +230,7 @@ const char *TGuiBldMenuDialog::GetParameters()
 
       // TODO: Combobox...
 
-      // if necessary, replace the selected object by it's address
+      // if necessary, replace the selected object by its address
       if (selfobjpos == nparam-1) {
          if (params[0]) strlcat(params, ",", 1024-strlen(params));
          snprintf(param, 255, "(TObject*)0x%zx", (size_t)fObject);

math/mathcore/src/TMath.cxx

@@ -2272,7 +2272,7 @@ Double_t TMath::ChisquareQuantile(Double_t p, Double_t ndf)
 /// F-distribution arises in testing whether two random samples
 /// have the same variance. It is the ratio of two chi-square
 /// distributions, with N and M degrees of freedom respectively,
-/// where each chi-square is first divided by it's number of degrees
+/// where each chi-square is first divided by its number of degrees
 /// of freedom.
 ///
 /// \author Anna Kreshuk