Add transcripts for fixed issues

This shows that this change fixes #1421, #2826, #5141, and #5168.

unison-src/transcripts/fix1421.md

@@ -0,0 +1,8 @@
+  ```ucm
+  scratch/main> alias.type ##Nat Nat
+  scratch/main> alias.term ##Nat.+ Nat.+
+  ```
+  ```unison
+  unique type A = A Nat
+  unique type B = B Nat Nat
+  ```

unison-src/transcripts/fix1421.output.md

@@ -0,0 +1,29 @@
+``` ucm
+scratch/main> alias.type ##Nat Nat
+
+  Done.
+
+scratch/main> alias.term ##Nat.+ Nat.+
+
+  Done.
+
+```
+``` unison
+unique type A = A Nat
+unique type B = B Nat Nat
+```
+
+``` ucm
+
+  Loading changes detected in scratch.u.
+
+  I found and typechecked these definitions in scratch.u. If you
+  do an `add` or `update`, here's how your codebase would
+  change:
+  
+    ⍟ These new definitions are ok to `add`:
+    
+      type A
+      type B
+
+```

unison-src/transcripts/fix2826.md

@@ -0,0 +1,23 @@
+```ucm
+scratch/main> builtins.mergeio
+```
+
+Supports fences that are longer than three backticks.
+
+````unison
+
+doc = {{
+  @typecheck ```
+  x = 3
+  ```
+}}
+
+````
+
+And round-trips properly.
+
+```ucm
+scratch/main> add
+scratch/main> edit doc
+scratch/main> load scratch.u
+```

unison-src/transcripts/fix2826.output.md

@@ -0,0 +1,66 @@
+``` ucm
+scratch/main> builtins.mergeio
+
+  Done.
+
+```
+Supports fences that are longer than three backticks.
+
+```` unison
+doc = {{
+  @typecheck ```
+  x = 3
+  ```
+}}
+
+````
+
+``` ucm
+
+  Loading changes detected in scratch.u.
+
+  I found and typechecked these definitions in scratch.u. If you
+  do an `add` or `update`, here's how your codebase would
+  change:
+  
+    ⍟ These new definitions are ok to `add`:
+    
+      doc : Doc2
+
+```
+And round-trips properly.
+
+``` ucm
+scratch/main> add
+
+  ⍟ I've added these definitions:
+  
+    doc : Doc2
+
+scratch/main> edit doc
+
+  ☝️
+  
+  I added 1 definitions to the top of scratch.u
+  
+  You can edit them there, then run `update` to replace the
+  definitions currently in this namespace.
+
+scratch/main> load scratch.u
+
+  Loading changes detected in scratch.u.
+
+  I found and typechecked the definitions in scratch.u. This
+  file has been previously added to the codebase.
+
+```
+```` unison:added-by-ucm scratch.u
+doc : Doc2
+doc =
+  {{
+  @typecheck ```
+  x = 3
+  ```
+  }}
+````
+

unison-src/transcripts/fix5141.md

@@ -0,0 +1,5 @@
+<!--
+```ucm
+.> invalid.command
+```
+-->

unison-src/transcripts/fix5141.output.md

@@ -0,0 +1,6 @@
+<!--
+```ucm
+.> invalid.command
+```
+-->
+

unison-src/transcripts/fix5168.md

@@ -0,0 +1,4 @@
+The `edit` seems to suppress a following ```` ```unison ```` block:
+```unison
+b = 2
+```

unison-src/transcripts/fix5168.output.md

@@ -0,0 +1,19 @@
+The `edit` seems to suppress a following ` ```unison ` block:
+
+``` unison
+b = 2
+```
+
+``` ucm
+
+  Loading changes detected in scratch.u.
+
+  I found and typechecked these definitions in scratch.u. If you
+  do an `add` or `update`, here's how your codebase would
+  change:
+  
+    ⍟ These new definitions are ok to `add`:
+    
+      b : ##Nat
+
+```