fix(dsl): close margin blocks at the closing tag

Blocks stayed open until the next character arrived, so following text
merged into them and trailing escapes dropped. Close each block right
at its tag and append escaped characters unconditionally.

app/src/main/java/com/example/research/ui/article/DslAnnotatedParser.kt

@@ -85,7 +85,6 @@ object DslAnnotatedParser {
         val lazyRefs = mutableListOf<LazyRef>()
         var accentNext = false
         var currentIndent = 0
-        var mClosedPendingBreak = false
         var lastAppended: Char? = null
         val exampleStyle = SpanStyle(color = colorScheme.secondaryText)
         val labelStyle = SpanStyle(color = colorScheme.labelText)
@@ -116,7 +115,6 @@ object DslAnnotatedParser {
             stack.forEach { builder.pushStyle(it) }
             lazyRefs.clear()
             lastAppended = null
-            mClosedPendingBreak = false
         }
 
         fun appendChar(char: Char, hard: Boolean = false) {
@@ -124,12 +122,6 @@ object DslAnnotatedParser {
                 if (lastAppended == null || lastAppended == ' ') return
             }
             lastAppended = char
-            if (mClosedPendingBreak) {
-                mClosedPendingBreak = false
-                if (refStack.isEmpty() && !char.isWhitespace()) {
-                    flushBlock()
-                }
-            }
             builder.append(char)
             if (refStack.isNotEmpty()) {
                 refStack.last().second.append(char)
@@ -158,7 +150,7 @@ object DslAnnotatedParser {
             when (val char = dsl[i]) {
                 '\\' -> {
                     if (i + 1 < length) {
-                        appendChar(dsl[i + 1])
+                        appendChar(dsl[i + 1], hard = true)
                         i += 2
                         continue
                     }
@@ -198,10 +190,11 @@ object DslAnnotatedParser {
                                 } else if (tagName == "'") {
                                     accentNext = false
                                 }
-                                if (tagName.startsWith("m")) {
-                                    mClosedPendingBreak = true
-                                }
                                 pop()
+                                if (tagName.startsWith("m")) {
+                                    flushBlock()
+                                    currentIndent = 0
+                                }
                             } else {
                                 when (tagName) {
                                     "'" -> {