Fix class/struct mismatches

src/completion.hh

@@ -9,7 +9,7 @@
 namespace Kakoune
 {
 
-class Context;
+struct Context;
 
 typedef std::vector<String> CandidateList;
 

src/editor.hh

@@ -87,7 +87,7 @@ public:
     bool is_editing() const { return m_edition_level!= 0; }
 
 private:
-    friend class scoped_edition;
+    friend struct scoped_edition;
     void begin_edition();
     void end_edition();
 

src/filter.hh

@@ -12,7 +12,7 @@ namespace Kakoune
 {
 
 class Buffer;
-class Selection;
+struct Selection;
 
 // A Filter is a function which is applied to a Buffer and a pending
 // Modification in order to mutate the Buffer or the Modification

src/hook_manager.hh

@@ -8,7 +8,7 @@
 namespace Kakoune
 {
 
-class Context;
+struct Context;
 typedef std::function<void (const String&, Context&)> HookFunc;
 
 class HookManager

src/register.hh

@@ -7,7 +7,7 @@
 namespace Kakoune
 {
 
-class Context;
+struct Context;
 
 class Register
 {

src/shell_manager.hh

@@ -9,7 +9,7 @@
 namespace Kakoune
 {
 
-class Context;
+struct Context;
 typedef std::function<String (const String& name, const Context&)> EnvVarRetriever;
 typedef std::unordered_map<String, String>     EnvVarMap;
 

src/user_interface.hh

@@ -11,7 +11,7 @@ namespace Kakoune
 
 class String;
 class DisplayBuffer;
-class DisplayCoord;
+struct DisplayCoord;
 
 enum class MenuStyle
 {