Fixes for swift 5.8 (#42)

* Fixes for swift 5.8

* Add 5.8 to CI

* More fixes

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
     timeout-minutes: 15
     strategy:
       matrix:
-        image: ["swift:5.9", "swift:5.10", "swiftlang/swift:nightly-6.0-jammy"]
+        image: ["swift:5.8", "swift:5.9", "swift:5.10", "swiftlang/swift:nightly-6.0-jammy"]
     
     container:
       image: ${{ matrix.image }}

.swiftformat

@@ -2,7 +2,7 @@
 --minversion 0.53.10
 
 # Swift version
---swiftversion 5.9
+--swiftversion 5.8
 
 # file options
 --exclude .build

Sources/Mustache/Context.swift

@@ -68,19 +68,21 @@ struct MustacheContext {
 
     /// return context with indent and parameter information for invoking a partial
     func withPartial(indented: String?, inheriting: [String: MustacheTemplate]?) -> MustacheContext {
-        let indentation: String? = if let indented {
-            (self.indentation ?? "") + indented
+        let indentation: String?
+        if let indented {
+            indentation = (self.indentation ?? "") + indented
         } else {
-            self.indentation
+            indentation = self.indentation
         }
-        let inherits: [String: MustacheTemplate]? = if let inheriting {
+        let inherits: [String: MustacheTemplate]?
+        if let inheriting {
             if let originalInherits = self.inherited {
-                originalInherits.merging(inheriting) { value, _ in value }
+                inherits = originalInherits.merging(inheriting) { value, _ in value }
             } else {
-                inheriting
+                inherits = inheriting
             }
         } else {
-            self.inherited
+            inherits = self.inherited
         }
         return .init(
             stack: self.stack,
@@ -95,10 +97,11 @@ struct MustacheContext {
 
     /// return context with indent information for invoking an inheritance block
     func withBlockExpansion(indented: String?) -> MustacheContext {
-        let indentation: String? = if let indented {
-            (self.indentation ?? "") + indented
+        let indentation: String?
+        if let indented {
+            indentation = (self.indentation ?? "") + indented
         } else {
-            self.indentation
+            indentation = self.indentation
         }
         return .init(
             stack: self.stack,