ci: fix gen2/gen3 gcc flags and step name formatting

- add -lm (el_runtime.c uses pow/sqrt/log/sin/cos/exp)
- add -Wl,--allow-multiple-definition to gen2 (is_digit/is_whitespace
  defined in both elc-bootstrap.c and el_runtime.c; bootstrap predates
  the text-processing primitives commit)
- remove colon from Self-host step name (Gitea YAML parser rejects it)
- replace em dashes in step names with hyphens

.gitea/workflows/ci-dev.yaml

@@ -1,4 +1,4 @@
-name: El SDK CI — dev
+name: El SDK CI - dev
 
 on:
   push:
@@ -27,18 +27,21 @@ jobs:
       # Gen2: compile the bootstrap C source into a working elc binary
       - name: Build elc from bootstrap (gen2)
         run: |
+          # -Wl,--allow-multiple-definition: elc-bootstrap.c and el_runtime.c both define
+          # is_digit/is_whitespace; bootstrap predates the text-processing primitives commit
           gcc -O2 \
             -I el-compiler/runtime \
             dist/elc-bootstrap.c \
             el-compiler/runtime/el_runtime.c \
-            -lcurl -lpthread \
+            -lcurl -lpthread -lm \
+            -Wl,--allow-multiple-definition \
             -o dist/elc-gen2
           chmod +x dist/elc-gen2
           echo "gen2 elc built"
           dist/elc-gen2 --version || true
 
       # Gen3: use gen2 to compile the El compiler from its own El source (self-host)
-      - name: Self-host: compile El compiler with gen2 (gen3)
+      - name: Self-host compile El compiler with gen2 (gen3)
         run: |
           mkdir -p dist/platform
           dist/elc-gen2 el-compiler/src/compiler.el > dist/elc-gen3.c
@@ -46,38 +49,38 @@ jobs:
             -I el-compiler/runtime \
             dist/elc-gen3.c \
             el-compiler/runtime/el_runtime.c \
-            -lcurl -lpthread \
+            -lcurl -lpthread -lm \
             -o dist/platform/elc
           chmod +x dist/platform/elc
           echo "gen3 (self-hosted) elc built"
           dist/platform/elc --version || true
 
-      - name: Run tests — text
+      - name: Run tests - text
         run: |
           ELC="$(pwd)/dist/platform/elc" \
           EL_HOME="$(pwd)" \
           bash tests/text/run.sh
 
-      - name: Run tests — calendar
+      - name: Run tests - calendar
         run: |
           ELC="$(pwd)/dist/platform/elc" \
           EL_HOME="$(pwd)" \
           bash tests/calendar/run.sh
 
-      - name: Run tests — time
+      - name: Run tests - time
         run: |
           ELC="$(pwd)/dist/platform/elc" \
           EL_HOME="$(pwd)" \
           bash tests/time/run.sh
 
-      - name: Run tests — html_sanitizer
+      - name: Run tests - html_sanitizer
         run: |
           ELC="$(pwd)/dist/platform/elc" \
           EL_HOME="$(pwd)" \
           bash tests/html_sanitizer/run.sh
 
       # Native El test suites (elc --test, compile-link-run)
-      - name: Run tests — native (core)
+      - name: Run tests - native (core)
         run: |
           set -euo pipefail
           ELC="$(pwd)/dist/platform/elc"
@@ -87,7 +90,7 @@ jobs:
             -lcurl -lpthread -lm -o /tmp/el_native_core
           /tmp/el_native_core
 
-      - name: Run tests — native (text)
+      - name: Run tests - native (text)
         run: |
           set -euo pipefail
           ELC="$(pwd)/dist/platform/elc"
@@ -97,7 +100,7 @@ jobs:
             -lcurl -lpthread -lm -o /tmp/el_native_text
           /tmp/el_native_text
 
-      - name: Run tests — native (string)
+      - name: Run tests - native (string)
         run: |
           set -euo pipefail
           ELC="$(pwd)/dist/platform/elc"
@@ -107,7 +110,7 @@ jobs:
             -lcurl -lpthread -lm -o /tmp/el_native_string
           /tmp/el_native_string
 
-      - name: Run tests — native (math)
+      - name: Run tests - native (math)
         run: |
           set -euo pipefail
           ELC="$(pwd)/dist/platform/elc"
@@ -117,7 +120,7 @@ jobs:
             -lcurl -lpthread -lm -o /tmp/el_native_math
           /tmp/el_native_math
 
-      - name: Run tests — native (state)
+      - name: Run tests - native (state)
         run: |
           set -euo pipefail
           ELC="$(pwd)/dist/platform/elc"
@@ -127,7 +130,7 @@ jobs:
             -lcurl -lpthread -lm -o /tmp/el_native_state
           /tmp/el_native_state
 
-      - name: Run tests — native (time)
+      - name: Run tests - native (time)
         run: |
           set -euo pipefail
           ELC="$(pwd)/dist/platform/elc"
@@ -137,7 +140,7 @@ jobs:
             -lcurl -lpthread -lm -o /tmp/el_native_time
           /tmp/el_native_time
 
-      - name: Run tests — native (json)
+      - name: Run tests - native (json)
         run: |
           set -euo pipefail
           ELC="$(pwd)/dist/platform/elc"
@@ -147,7 +150,7 @@ jobs:
             -lcurl -lpthread -lm -o /tmp/el_native_json
           /tmp/el_native_json
 
-      - name: Run tests — native (env)
+      - name: Run tests - native (env)
         run: |
           set -euo pipefail
           ELC="$(pwd)/dist/platform/elc"
@@ -157,7 +160,7 @@ jobs:
             -lcurl -lpthread -lm -o /tmp/el_native_env
           /tmp/el_native_env
 
-      - name: Run tests — native (fs)
+      - name: Run tests - native (fs)
         run: |
           set -euo pipefail
           ELC="$(pwd)/dist/platform/elc"